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Text File | 1994-02-07 | 66.6 KB | 2,524 lines |
- /* YACC parser for C syntax and for Objective C. -*-c-*-
- Copyright (C) 1987, 1988, 1989, 1992 Free Software Foundation, Inc.
-
- This file is part of GNU CC.
-
- GNU CC is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU CC is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* This file defines the grammar of C and that of Objective C.
- ifobjc ... end ifobjc conditionals contain code for Objective C only.
- ifc ... end ifc conditionals contain code for C only.
- The awk script cond.awk is used to convert this file into
- c-parse.y and into objc-parse.y. */
-
- /* To whomever it may concern: I have heard that such a thing was once
- written by AT&T, but I have never seen it. */
-
- ifobjc
- %expect 56
- end ifobjc
- ifc
- %expect 8
-
- /* These are the 8 conflicts you should get in parse.output;
- the state numbers may vary if minor changes in the grammar are made.
-
- State 41 contains 1 shift/reduce conflict. (Two ways to recover from error.)
- State 92 contains 1 shift/reduce conflict. (Two ways to recover from error.)
- State 99 contains 1 shift/reduce conflict. (Two ways to recover from error.)
- State 103 contains 1 shift/reduce conflict. (Two ways to recover from error.)
- State 119 contains 1 shift/reduce conflict. (See comment at component_decl.)
- State 183 contains 1 shift/reduce conflict. (Two ways to recover from error.)
- State 193 contains 1 shift/reduce conflict. (Two ways to recover from error.)
- State 199 contains 1 shift/reduce conflict. (Two ways to recover from error.)
- */
- end ifc
-
- %{
- #include <stdio.h>
- #include <errno.h>
- #include <setjmp.h>
-
- #include "config.h"
- #include "tree.h"
- #include "input.h"
- #include "c-lex.h"
- #include "c-tree.h"
- #include "flags.h"
-
- #ifdef MULTIBYTE_CHARS
- #include <stdlib.h>
- #include <locale.h>
- #endif
-
- ifobjc
- #include "objc-actions.h"
- end ifobjc
-
- #ifndef errno
- extern int errno;
- #endif
-
- void yyerror ();
-
- /* Like YYERROR but do call yyerror. */
- #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
-
- /* Cause the `yydebug' variable to be defined. */
- #define YYDEBUG 1
- %}
-
- %start program
-
- %union {long itype; tree ttype; enum tree_code code;
- char *filename; int lineno; }
-
- /* All identifiers that are not reserved words
- and are not declared typedefs in the current block */
- %token IDENTIFIER
-
- /* All identifiers that are declared typedefs in the current block.
- In some contexts, they are treated just like IDENTIFIER,
- but they can also serve as typespecs in declarations. */
- %token TYPENAME
-
- /* Reserved words that specify storage class.
- yylval contains an IDENTIFIER_NODE which indicates which one. */
- %token SCSPEC
-
- /* Reserved words that specify type.
- yylval contains an IDENTIFIER_NODE which indicates which one. */
- %token TYPESPEC
-
- /* Reserved words that qualify type: "const" or "volatile".
- yylval contains an IDENTIFIER_NODE which indicates which one. */
- %token TYPE_QUAL
-
- /* Character or numeric constants.
- yylval is the node for the constant. */
- %token CONSTANT
-
- /* String constants in raw form.
- yylval is a STRING_CST node. */
- %token STRING
-
- /* "...", used for functions with variable arglists. */
- %token ELLIPSIS
-
- /* the reserved words */
- /* SCO include files test "ASM", so use something else. */
- %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
- %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF ALIGN
- %token ATTRIBUTE EXTENSION LABEL
-
- /* Add precedence rules to solve dangling else s/r conflict */
- %nonassoc IF
- %nonassoc ELSE
-
- /* Define the operator tokens and their precedences.
- The value is an integer because, if used, it is the tree code
- to use in the expression made from the operator. */
-
- %right <code> ASSIGN '='
- %right <code> '?' ':'
- %left <code> OROR
- %left <code> ANDAND
- %left <code> '|'
- %left <code> '^'
- %left <code> '&'
- %left <code> EQCOMPARE
- %left <code> ARITHCOMPARE
- %left <code> LSHIFT RSHIFT
- %left <code> '+' '-'
- %left <code> '*' '/' '%'
- %right <code> UNARY PLUSPLUS MINUSMINUS
- %left HYPERUNARY
- %left <code> POINTSAT '.' '(' '['
-
- /* The Objective-C keywords. These are included in C and in
- Objective C, so that the token codes are the same in both. */
- %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
- %token CLASSNAME PUBLIC
-
-
- %type <code> unop
-
- %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
- %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
- %type <ttype> typed_declspecs reserved_declspecs
- %type <ttype> typed_typespecs reserved_typespecquals
- %type <ttype> declmods typespec typespecqual_reserved
- %type <ttype> SCSPEC TYPESPEC TYPE_QUAL nonempty_type_quals maybe_type_qual
- %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
- %type <ttype> init initlist maybeasm
- %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
- %type <ttype> maybe_attribute attribute_list attrib
-
- %type <ttype> compstmt
-
- %type <ttype> declarator
- %type <ttype> notype_declarator after_type_declarator
- %type <ttype> parm_declarator
-
- %type <ttype> structsp component_decl_list component_decl_list2
- %type <ttype> component_decl components component_declarator
- %type <ttype> enumlist enumerator
- %type <ttype> typename absdcl absdcl1 type_quals
- %type <ttype> xexpr parms parm identifiers
-
- %type <ttype> parmlist parmlist_1 parmlist_2
- %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
- %type <ttype> identifiers_or_typenames
-
- %type <itype> setspecs
-
- %type <filename> save_filename
- %type <lineno> save_lineno
-
- ifobjc
- /* the Objective-C nonterminals */
-
- %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
- %type <ttype> methoddecl unaryselector keywordselector selector
- %type <ttype> keyworddecl receiver objcmessageexpr messageargs
- %type <ttype> keywordexpr keywordarglist keywordarg
- %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
- %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
- %type <ttype> CLASSNAME
- end ifobjc
-
- %{
- /* Number of statements (loosely speaking) seen so far. */
- static int stmt_count;
-
- /* Input file and line number of the end of the body of last simple_if;
- used by the stmt-rule immediately after simple_if returns. */
- static char *if_stmt_file;
- static int if_stmt_line;
-
- /* List of types and structure classes of the current declaration. */
- static tree current_declspecs;
-
- /* Stack of saved values of current_declspecs. */
- static tree declspec_stack;
-
- /* 1 if we explained undeclared var errors. */
- static int undeclared_variable_notice;
-
- ifobjc
- /* Objective-C specific information */
-
- tree objc_interface_context;
- tree objc_implementation_context;
- tree objc_method_context;
- tree objc_ivar_chain;
- tree objc_ivar_context;
- enum tree_code objc_inherit_code;
- int objc_receiver_context;
- int objc_public_flag;
-
- end ifobjc
-
- /* Tell yyparse how to print a token's value, if yydebug is set. */
-
- #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
- extern void yyprint ();
- %}
-
- %%
- program: /* empty */
- { if (pedantic)
- pedwarn ("ANSI C forbids an empty source file");
- ifobjc
- objc_finish ();
- end ifobjc
- }
- | extdefs
- {
- ifobjc
- objc_finish ();
- end ifobjc
- }
- ;
-
- /* the reason for the strange actions in this rule
- is so that notype_initdecls when reached via datadef
- can find a valid list of type and sc specs in $0. */
-
- extdefs:
- {$<ttype>$ = NULL_TREE; } extdef
- | extdefs {$<ttype>$ = NULL_TREE; } extdef
- ;
-
- extdef:
- fndef
- | datadef
- ifobjc
- | objcdef
- end ifobjc
- | ASM_KEYWORD '(' expr ')' ';'
- { STRIP_NOPS ($3);
- if ((TREE_CODE ($3) == ADDR_EXPR
- && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
- || TREE_CODE ($3) == STRING_CST)
- assemble_asm ($3);
- else
- error ("argument of `asm' is not a constant string"); }
- ;
-
- datadef:
- setspecs notype_initdecls ';'
- { if (pedantic)
- error ("ANSI C forbids data definition with no type or storage class");
- else if (!flag_traditional)
- warning ("data definition has no type or storage class"); }
- | declmods setspecs notype_initdecls ';'
- {}
- | typed_declspecs setspecs initdecls ';'
- {}
- | declmods ';'
- { pedwarn ("empty declaration"); }
- | typed_declspecs ';'
- { shadow_tag ($1); }
- | error ';'
- | error '}'
- | ';'
- { if (pedantic)
- pedwarn ("ANSI C does not allow extra `;' outside of a function"); }
- ;
-
- fndef:
- typed_declspecs setspecs declarator
- { if (! start_function ($1, $3, 0))
- YYERROR1;
- reinit_parse_for_function (); }
- xdecls
- { store_parm_decls (); }
- compstmt_or_error
- { finish_function (0); }
- | typed_declspecs setspecs declarator error
- { }
- | declmods setspecs notype_declarator
- { if (! start_function ($1, $3, 0))
- YYERROR1;
- reinit_parse_for_function (); }
- xdecls
- { store_parm_decls (); }
- compstmt_or_error
- { finish_function (0); }
- | declmods setspecs notype_declarator error
- { }
- | setspecs notype_declarator
- { if (! start_function (NULL_TREE, $2, 0))
- YYERROR1;
- reinit_parse_for_function (); }
- xdecls
- { store_parm_decls (); }
- compstmt_or_error
- { finish_function (0); }
- | setspecs notype_declarator error
- { }
- ;
-
- identifier:
- IDENTIFIER
- | TYPENAME
- ifobjc
- | CLASSNAME
- { $$ = CLASS_NAME ($1); }
- end ifobjc
- ;
-
- unop: '&'
- { $$ = ADDR_EXPR; }
- | '-'
- { $$ = NEGATE_EXPR; }
- | '+'
- { $$ = CONVERT_EXPR; }
- | PLUSPLUS
- { $$ = PREINCREMENT_EXPR; }
- | MINUSMINUS
- { $$ = PREDECREMENT_EXPR; }
- | '~'
- { $$ = BIT_NOT_EXPR; }
- | '!'
- { $$ = TRUTH_NOT_EXPR; }
- ;
-
- expr: nonnull_exprlist
- { $$ = build_compound_expr ($1); }
- ;
-
- exprlist:
- /* empty */
- { $$ = NULL_TREE; }
- | nonnull_exprlist
- ;
-
- nonnull_exprlist:
- expr_no_commas
- { $$ = build_tree_list (NULL_TREE, $1); }
- | nonnull_exprlist ',' expr_no_commas
- { chainon ($1, build_tree_list (NULL_TREE, $3)); }
- ;
-
- unary_expr:
- primary
- | '*' cast_expr %prec UNARY
- { $$ = build_indirect_ref ($2, "unary *"); }
- /* __extension__ turns off -pedantic for following primary. */
- | EXTENSION
- { $<itype>1 = pedantic;
- pedantic = 0; }
- cast_expr %prec UNARY
- { $$ = $3;
- pedantic = $<itype>1; }
- | unop cast_expr %prec UNARY
- { $$ = build_unary_op ($1, $2, 0); }
- /* Refer to the address of a label as a pointer. */
- | ANDAND identifier
- { tree label = lookup_label ($2);
- TREE_USED (label) = 1;
- $$ = build1 (ADDR_EXPR, ptr_type_node, label);
- TREE_CONSTANT ($$) = 1; }
- /* This seems to be impossible on some machines, so let's turn it off.
- You can use __builtin_next_arg to find the anonymous stack args.
- | '&' ELLIPSIS
- { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
- $$ = error_mark_node;
- if (TREE_VALUE (tree_last (types)) == void_type_node)
- error ("`&...' used in function with fixed number of arguments");
- else
- {
- if (pedantic)
- pedwarn ("ANSI C forbids `&...'");
- $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
- $$ = build_unary_op (ADDR_EXPR, $$, 0);
- } }
- */
- | SIZEOF unary_expr %prec UNARY
- { if (TREE_CODE ($2) == COMPONENT_REF
- && DECL_BIT_FIELD (TREE_OPERAND ($2, 1)))
- error ("`sizeof' applied to a bit-field");
- $$ = c_sizeof (TREE_TYPE ($2)); }
- | SIZEOF '(' typename ')' %prec HYPERUNARY
- { $$ = c_sizeof (groktypename ($3)); }
- | ALIGNOF unary_expr %prec UNARY
- { $$ = c_alignof_expr ($2); }
- | ALIGNOF '(' typename ')' %prec HYPERUNARY
- { $$ = c_alignof (groktypename ($3)); }
- ;
-
- cast_expr:
- unary_expr
- | '(' typename ')' cast_expr %prec UNARY
- { tree type = groktypename ($2);
- $$ = build_c_cast (type, $4); }
- | '(' typename ')' '{' initlist maybecomma '}' %prec UNARY
- { tree type = groktypename ($2);
- char *name;
- if (pedantic)
- pedwarn ("ANSI C forbids constructor expressions");
- if (TYPE_NAME (type) != 0)
- {
- if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
- name = IDENTIFIER_POINTER (TYPE_NAME (type));
- else
- name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
- }
- else
- name = "";
- $$ = digest_init (type, build_nt (CONSTRUCTOR, NULL_TREE, nreverse ($5)),
- NULL_PTR, 0, 0, name);
- if (TREE_CODE (type) == ARRAY_TYPE && TYPE_SIZE (type) == 0)
- {
- int failure = complete_array_type (type, $$, 1);
- if (failure)
- abort ();
- }
- }
- ;
-
- expr_no_commas:
- cast_expr
- | expr_no_commas '+' expr_no_commas
- { $$ = parser_build_binary_op ($2, $1, $3); }
- | expr_no_commas '-' expr_no_commas
- { $$ = parser_build_binary_op ($2, $1, $3); }
- | expr_no_commas '*' expr_no_commas
- { $$ = parser_build_binary_op ($2, $1, $3); }
- | expr_no_commas '/' expr_no_commas
- { $$ = parser_build_binary_op ($2, $1, $3); }
- | expr_no_commas '%' expr_no_commas
- { $$ = parser_build_binary_op ($2, $1, $3); }
- | expr_no_commas LSHIFT expr_no_commas
- { $$ = parser_build_binary_op ($2, $1, $3); }
- | expr_no_commas RSHIFT expr_no_commas
- { $$ = parser_build_binary_op ($2, $1, $3); }
- | expr_no_commas ARITHCOMPARE expr_no_commas
- { $$ = parser_build_binary_op ($2, $1, $3); }
- | expr_no_commas EQCOMPARE expr_no_commas
- { $$ = parser_build_binary_op ($2, $1, $3); }
- | expr_no_commas '&' expr_no_commas
- { $$ = parser_build_binary_op ($2, $1, $3); }
- | expr_no_commas '|' expr_no_commas
- { $$ = parser_build_binary_op ($2, $1, $3); }
- | expr_no_commas '^' expr_no_commas
- { $$ = parser_build_binary_op ($2, $1, $3); }
- | expr_no_commas ANDAND expr_no_commas
- { $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $3); }
- | expr_no_commas OROR expr_no_commas
- { $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $3); }
- | expr_no_commas '?' xexpr ':' expr_no_commas
- { $$ = build_conditional_expr ($1, $3, $5); }
- | expr_no_commas '=' expr_no_commas
- { $$ = build_modify_expr ($1, NOP_EXPR, $3);
- C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR); }
- | expr_no_commas ASSIGN expr_no_commas
- { $$ = build_modify_expr ($1, $2, $3);
- C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR); }
- ;
-
- primary:
- IDENTIFIER
- {
- tree context;
-
- $$ = lastiddecl;
- if (!$$ || $$ == error_mark_node)
- {
- if (yychar == YYEMPTY)
- yychar = YYLEX;
- if (yychar == '(')
- {
- ifobjc
- if (objc_receiver_context
- && ! (objc_receiver_context
- && strcmp (IDENTIFIER_POINTER ($1), "super")))
- /* we have a message to super */
- $$ = get_super_receiver ();
- else if (objc_method_context
- && is_ivar (objc_ivar_chain, $1))
- $$ = build_ivar_reference ($1);
- else
- end ifobjc
- {
- /* Ordinary implicit function declaration. */
- $$ = implicitly_declare ($1);
- assemble_external ($$);
- TREE_USED ($$) = 1;
- }
- }
- else if (current_function_decl == 0)
- {
- error ("`%s' undeclared, outside of functions",
- IDENTIFIER_POINTER ($1));
- $$ = error_mark_node;
- }
- else
- {
- ifobjc
- if (objc_receiver_context
- && ! strcmp (IDENTIFIER_POINTER ($1), "super"))
- /* we have a message to super */
- $$ = get_super_receiver ();
- else if (objc_method_context
- && is_ivar (objc_ivar_chain, $1))
- $$ = build_ivar_reference ($1);
- else
- end ifobjc
- {
- if (IDENTIFIER_GLOBAL_VALUE ($1) != error_mark_node
- || IDENTIFIER_ERROR_LOCUS ($1) != current_function_decl)
- {
- error ("`%s' undeclared (first use this function)",
- IDENTIFIER_POINTER ($1));
-
- if (! undeclared_variable_notice)
- {
- error ("(Each undeclared identifier is reported only once");
- error ("for each function it appears in.)");
- undeclared_variable_notice = 1;
- }
- }
- $$ = error_mark_node;
- /* Prevent repeated error messages. */
- IDENTIFIER_GLOBAL_VALUE ($1) = error_mark_node;
- IDENTIFIER_ERROR_LOCUS ($1) = current_function_decl;
- }
- }
- }
- else if (TREE_TYPE ($$) == error_mark_node)
- $$ = error_mark_node;
- else if (C_DECL_ANTICIPATED ($$))
- {
- /* The first time we see a build-in function used,
- if it has not been declared. */
- C_DECL_ANTICIPATED ($$) = 0;
- if (yychar == YYEMPTY)
- yychar = YYLEX;
- if (yychar == '(')
- {
- /* Omit the implicit declaration we
- would ordinarily do, so we don't lose
- the actual built in type.
- But print a diagnostic for the mismatch. */
- ifobjc
- if (objc_method_context
- && is_ivar (objc_ivar_chain, $1))
- error ("Instance variable `%s' implicitly declared as function",
- IDENTIFIER_POINTER (DECL_NAME ($$)));
- else
- end ifobjc
- if (TREE_CODE ($$) != FUNCTION_DECL)
- error ("`%s' implicitly declared as function",
- IDENTIFIER_POINTER (DECL_NAME ($$)));
- else if ((TYPE_MODE (TREE_TYPE (TREE_TYPE ($$)))
- != TYPE_MODE (integer_type_node))
- && (TREE_TYPE (TREE_TYPE ($$))
- != void_type_node))
- pedwarn ("type mismatch in implicit declaration for built-in function `%s'",
- IDENTIFIER_POINTER (DECL_NAME ($$)));
- /* If it really returns void, change that to int. */
- if (TREE_TYPE (TREE_TYPE ($$)) == void_type_node)
- TREE_TYPE ($$)
- = build_function_type (integer_type_node,
- TYPE_ARG_TYPES (TREE_TYPE ($$)));
- }
- else
- pedwarn ("built-in function `%s' used without declaration",
- IDENTIFIER_POINTER (DECL_NAME ($$)));
-
- /* Do what we would ordinarily do when a fn is used. */
- assemble_external ($$);
- TREE_USED ($$) = 1;
- }
- else
- {
- assemble_external ($$);
- TREE_USED ($$) = 1;
- ifobjc
- /* we have a definition - still check if iVariable */
-
- if (!objc_receiver_context
- || (objc_receiver_context
- && strcmp (IDENTIFIER_POINTER ($1), "super")))
- {
- if (objc_method_context
- && is_ivar (objc_ivar_chain, $1))
- {
- if (IDENTIFIER_LOCAL_VALUE ($1))
- warning ("local declaration of `%s' hides instance variable",
- IDENTIFIER_POINTER ($1));
- else
- $$ = build_ivar_reference ($1);
- }
- }
- else /* we have a message to super */
- $$ = get_super_receiver ();
- end ifobjc
- }
-
- if (TREE_CODE ($$) == CONST_DECL)
- {
- $$ = DECL_INITIAL ($$);
- /* This is to prevent an enum whose value is 0
- from being considered a null pointer constant. */
- $$ = build1 (NOP_EXPR, TREE_TYPE ($$), $$);
- TREE_CONSTANT ($$) = 1;
- }
- }
- | CONSTANT
- | string
- { $$ = combine_strings ($1); }
- | '(' expr ')'
- { char class = TREE_CODE_CLASS (TREE_CODE ($2));
- if (class == 'e' || class == '1'
- || class == '2' || class == '<')
- C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
- $$ = $2; }
- | '(' error ')'
- { $$ = error_mark_node; }
- | '('
- { if (current_function_decl == 0)
- {
- error ("braced-group within expression allowed only inside a function");
- YYERROR;
- }
- /* We must force a BLOCK for this level
- so that, if it is not expanded later,
- there is a way to turn off the entire subtree of blocks
- that are contained in it. */
- keep_next_level ();
- push_label_level ();
- $<ttype>$ = expand_start_stmt_expr (); }
- compstmt ')'
- { tree rtl_exp;
- if (pedantic)
- pedwarn ("ANSI C forbids braced-groups within expressions");
- pop_label_level ();
- rtl_exp = expand_end_stmt_expr ($<ttype>2);
- /* The statements have side effects, so the group does. */
- TREE_SIDE_EFFECTS (rtl_exp) = 1;
-
- /* Make a BIND_EXPR for the BLOCK already made. */
- $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp),
- NULL_TREE, rtl_exp, $3);
- /* Remove the block from the tree at this point.
- It gets put back at the proper place
- when the BIND_EXPR is expanded. */
- delete_block ($3);
- }
- | primary '(' exprlist ')' %prec '.'
- { $$ = build_function_call ($1, $3); }
- | primary '[' expr ']' %prec '.'
- { $$ = build_array_ref ($1, $3); }
- | primary '.' identifier
- {
- ifobjc
- if (doing_objc_thang)
- {
- if (is_public ($1, $3))
- $$ = build_component_ref ($1, $3);
- else
- $$ = error_mark_node;
- }
- else
- end ifobjc
- $$ = build_component_ref ($1, $3);
- }
- | primary POINTSAT identifier
- {
- tree expr = build_indirect_ref ($1, "->");
-
- ifobjc
- if (doing_objc_thang)
- {
- if (is_public (expr, $3))
- $$ = build_component_ref (expr, $3);
- else
- $$ = error_mark_node;
- }
- else
- end ifobjc
- $$ = build_component_ref (expr, $3);
- }
- | primary PLUSPLUS
- { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
- | primary MINUSMINUS
- { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
- ifobjc
- | objcmessageexpr
- { $$ = build_message_expr ($1); }
- | objcselectorexpr
- { $$ = build_selector_expr ($1); }
- | objcencodeexpr
- { $$ = build_encode_expr ($1); }
- end ifobjc
- ;
-
- /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
- string:
- STRING
- | string STRING
- { $$ = chainon ($1, $2); }
- ;
-
- xdecls:
- /* empty */
- | datadecls
- | datadecls ELLIPSIS
- /* ... is used here to indicate a varargs function. */
- { c_mark_varargs ();
- if (pedantic)
- pedwarn ("ANSI C does not permit use of `varargs.h'"); }
- ;
-
- /* The following are analogous to lineno_decl, decls and decl
- except that they do not allow nested functions.
- They are used for old-style parm decls. */
- lineno_datadecl:
- save_filename save_lineno datadecl
- { }
- ;
-
- datadecls:
- lineno_datadecl
- | errstmt
- | datadecls lineno_datadecl
- | lineno_datadecl errstmt
- ;
-
- datadecl:
- typed_declspecs setspecs initdecls ';'
- { current_declspecs = TREE_VALUE (declspec_stack);
- declspec_stack = TREE_CHAIN (declspec_stack);
- resume_momentary ($2); }
- | declmods setspecs notype_initdecls ';'
- { current_declspecs = TREE_VALUE (declspec_stack);
- declspec_stack = TREE_CHAIN (declspec_stack);
- resume_momentary ($2); }
- | typed_declspecs ';'
- { shadow_tag_warned ($1, 1);
- pedwarn ("empty declaration"); }
- | declmods ';'
- { pedwarn ("empty declaration"); }
- ;
-
- /* This combination which saves a lineno before a decl
- is the normal thing to use, rather than decl itself.
- This is to avoid shift/reduce conflicts in contexts
- where statement labels are allowed. */
- lineno_decl:
- save_filename save_lineno decl
- { }
- ;
-
- decls:
- lineno_decl
- | errstmt
- | decls lineno_decl
- | lineno_decl errstmt
- ;
-
- /* records the type and storage class specs to use for processing
- the declarators that follow.
- Maintains a stack of outer-level values of current_declspecs,
- for the sake of parm declarations nested in function declarators. */
- setspecs: /* empty */
- { $$ = suspend_momentary ();
- pending_xref_error ();
- declspec_stack = tree_cons (NULL_TREE, current_declspecs,
- declspec_stack);
- current_declspecs = $<ttype>0; }
- ;
-
- decl:
- typed_declspecs setspecs initdecls ';'
- { current_declspecs = TREE_VALUE (declspec_stack);
- declspec_stack = TREE_CHAIN (declspec_stack);
- resume_momentary ($2); }
- | declmods setspecs notype_initdecls ';'
- { current_declspecs = TREE_VALUE (declspec_stack);
- declspec_stack = TREE_CHAIN (declspec_stack);
- resume_momentary ($2); }
- | typed_declspecs setspecs nested_function
- { current_declspecs = TREE_VALUE (declspec_stack);
- declspec_stack = TREE_CHAIN (declspec_stack);
- resume_momentary ($2); }
- | declmods setspecs notype_nested_function
- { current_declspecs = TREE_VALUE (declspec_stack);
- declspec_stack = TREE_CHAIN (declspec_stack);
- resume_momentary ($2); }
- | typed_declspecs ';'
- { shadow_tag ($1); }
- | declmods ';'
- { pedwarn ("empty declaration"); }
- ;
-
- /* Declspecs which contain at least one type specifier or typedef name.
- (Just `const' or `volatile' is not enough.)
- A typedef'd name following these is taken as a name to be declared. */
-
- typed_declspecs:
- typespec reserved_declspecs
- { $$ = tree_cons (NULL_TREE, $1, $2); }
- | declmods typespec reserved_declspecs
- { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
- ;
-
- reserved_declspecs: /* empty */
- { $$ = NULL_TREE; }
- | reserved_declspecs typespecqual_reserved
- { $$ = tree_cons (NULL_TREE, $2, $1); }
- | reserved_declspecs SCSPEC
- { if (extra_warnings)
- warning ("`%s' is not at beginning of declaration",
- IDENTIFIER_POINTER ($2));
- $$ = tree_cons (NULL_TREE, $2, $1); }
- ;
-
- /* List of just storage classes and type modifiers.
- A declaration can start with just this, but then it cannot be used
- to redeclare a typedef-name. */
-
- declmods:
- TYPE_QUAL
- { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
- TREE_STATIC ($$) = 1; }
- | SCSPEC
- { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
- | declmods TYPE_QUAL
- { $$ = tree_cons (NULL_TREE, $2, $1);
- TREE_STATIC ($$) = 1; }
- | declmods SCSPEC
- { if (extra_warnings && TREE_STATIC ($1))
- warning ("`%s' is not at beginning of declaration",
- IDENTIFIER_POINTER ($2));
- $$ = tree_cons (NULL_TREE, $2, $1);
- TREE_STATIC ($$) = TREE_STATIC ($1); }
- ;
-
-
- /* Used instead of declspecs where storage classes are not allowed
- (that is, for typenames and structure components).
- Don't accept a typedef-name if anything but a modifier precedes it. */
-
- typed_typespecs:
- typespec reserved_typespecquals
- { $$ = tree_cons (NULL_TREE, $1, $2); }
- | nonempty_type_quals typespec reserved_typespecquals
- { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
- ;
-
- reserved_typespecquals: /* empty */
- { $$ = NULL_TREE; }
- | reserved_typespecquals typespecqual_reserved
- { $$ = tree_cons (NULL_TREE, $2, $1); }
- ;
-
- /* A typespec (but not a type qualifier).
- Once we have seen one of these in a declaration,
- if a typedef name appears then it is being redeclared. */
-
- typespec: TYPESPEC
- | structsp
- | TYPENAME
- { /* For a typedef name, record the meaning, not the name.
- In case of `foo foo, bar;'. */
- $$ = lookup_name ($1); }
- ifobjc
- | CLASSNAME
- { $$ = get_static_reference ($1); }
- end ifobjc
- | TYPEOF '(' expr ')'
- { $$ = TREE_TYPE ($3); }
- | TYPEOF '(' typename ')'
- { $$ = groktypename ($3); }
- ;
-
- /* A typespec that is a reserved word, or a type qualifier. */
-
- typespecqual_reserved: TYPESPEC
- | TYPE_QUAL
- | structsp
- ;
-
- initdecls:
- initdcl
- | initdecls ',' initdcl
- ;
-
- notype_initdecls:
- notype_initdcl
- | notype_initdecls ',' initdcl
- ;
-
- maybeasm:
- /* empty */
- { $$ = NULL_TREE; }
- | ASM_KEYWORD '(' string ')'
- { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
- $$ = $3;
- }
- ;
-
- initdcl:
- declarator maybeasm maybe_attribute '='
- { $<ttype>$ = start_decl ($1, current_declspecs, 1); }
- init
- /* Note how the declaration of the variable is in effect while its init is parsed! */
- { decl_attributes ($<ttype>5, $3);
- finish_decl ($<ttype>5, $6, $2); }
- | declarator maybeasm maybe_attribute
- { tree d = start_decl ($1, current_declspecs, 0);
- decl_attributes (d, $3);
- finish_decl (d, NULL_TREE, $2); }
- ;
-
- notype_initdcl:
- notype_declarator maybeasm maybe_attribute '='
- { $<ttype>$ = start_decl ($1, current_declspecs, 1); }
- init
- /* Note how the declaration of the variable is in effect while its init is parsed! */
- { decl_attributes ($<ttype>5, $3);
- finish_decl ($<ttype>5, $6, $2); }
- | notype_declarator maybeasm maybe_attribute
- { tree d = start_decl ($1, current_declspecs, 0);
- decl_attributes (d, $3);
- finish_decl (d, NULL_TREE, $2); }
- ;
- /* the * rules are dummies to accept the Apollo extended syntax
- so that the header files compile. */
- maybe_attribute:
- /* empty */
- { $$ = NULL_TREE; }
- | ATTRIBUTE '(' '(' attribute_list ')' ')'
- { $$ = $4; }
- ;
-
- attribute_list
- : attrib
- { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
- | attribute_list ',' attrib
- { $$ = tree_cons (NULL_TREE, $3, $1); }
- ;
-
- attrib
- : IDENTIFIER
- { if (strcmp (IDENTIFIER_POINTER ($1), "packed"))
- warning ("`%s' attribute directive ignored",
- IDENTIFIER_POINTER ($1));
- $$ = $1; }
- | IDENTIFIER '(' IDENTIFIER ')'
- { /* If not "mode (m)", then issue warning. */
- if (strcmp (IDENTIFIER_POINTER ($1), "mode") != 0)
- {
- warning ("`%s' attribute directive ignored",
- IDENTIFIER_POINTER ($1));
- $$ = $1;
- }
- else
- $$ = tree_cons ($1, $3, NULL_TREE); }
- | IDENTIFIER '(' CONSTANT ')'
- { /* if not "aligned(n)", then issue warning */
- if (strcmp (IDENTIFIER_POINTER ($1), "aligned") != 0
- || TREE_CODE ($3) != INTEGER_CST)
- {
- warning ("`%s' attribute directive ignored",
- IDENTIFIER_POINTER ($1));
- $$ = $1;
- }
- else
- $$ = tree_cons ($1, $3, NULL_TREE); }
- | IDENTIFIER '(' IDENTIFIER ',' CONSTANT ',' CONSTANT ')'
- { /* if not "format(...)", then issue warning */
- if (strcmp (IDENTIFIER_POINTER ($1), "format") != 0
- || TREE_CODE ($5) != INTEGER_CST
- || TREE_CODE ($7) != INTEGER_CST)
- {
- warning ("`%s' attribute directive ignored",
- IDENTIFIER_POINTER ($1));
- $$ = $1;
- }
- else
- $$ = tree_cons ($1,
- tree_cons ($3,
- tree_cons ($5, $7, NULL_TREE),
- NULL_TREE),
- NULL_TREE); }
- ;
-
- init:
- expr_no_commas
- | '{' '}'
- { $$ = build_nt (CONSTRUCTOR, NULL_TREE, NULL_TREE);
- if (pedantic)
- pedwarn ("ANSI C forbids empty initializer braces"); }
- | '{' initlist '}'
- { $$ = build_nt (CONSTRUCTOR, NULL_TREE, nreverse ($2)); }
- | '{' initlist ',' '}'
- { $$ = build_nt (CONSTRUCTOR, NULL_TREE, nreverse ($2)); }
- | error
- { $$ = NULL_TREE; }
- ;
-
- /* This chain is built in reverse order,
- and put in forward order where initlist is used. */
- initlist:
- init
- { $$ = build_tree_list (NULL_TREE, $1); }
- | initlist ',' init
- { $$ = tree_cons (NULL_TREE, $3, $1); }
- /* These are for labeled elements. */
- | '[' expr_no_commas ELLIPSIS expr_no_commas ']' init
- { $$ = build_tree_list (tree_cons ($2, NULL_TREE,
- build_tree_list ($4, NULL_TREE)),
- $6); }
- | initlist ',' '[' expr_no_commas ELLIPSIS expr_no_commas ']' init
- { $$ = tree_cons (tree_cons ($4, NULL_TREE,
- build_tree_list ($6, NULL_TREE)),
- $8,
- $1); }
- | '[' expr_no_commas ']' init
- { $$ = build_tree_list ($2, $4); }
- | initlist ',' '[' expr_no_commas ']' init
- { $$ = tree_cons ($4, $6, $1); }
- | identifier ':' init
- { $$ = build_tree_list ($1, $3); }
- | initlist ',' identifier ':' init
- { $$ = tree_cons ($3, $5, $1); }
- ;
-
- nested_function:
- declarator
- { push_c_function_context ();
- if (! start_function (current_declspecs, $1, 1))
- {
- pop_c_function_context ();
- YYERROR1;
- }
- reinit_parse_for_function ();
- store_parm_decls (); }
- /* This used to use compstmt_or_error.
- That caused a bug with input `f(g) int g {}',
- where the use of YYERROR1 above caused an error
- which then was handled by compstmt_or_error.
- There followed a repeated execution of that same rule,
- which called YYERROR1 again, and so on. */
- compstmt
- { finish_function (1);
- pop_c_function_context (); }
- ;
-
- notype_nested_function:
- notype_declarator
- { push_c_function_context ();
- if (! start_function (current_declspecs, $1, 1))
- {
- pop_c_function_context ();
- YYERROR1;
- }
- reinit_parse_for_function ();
- store_parm_decls (); }
- /* This used to use compstmt_or_error.
- That caused a bug with input `f(g) int g {}',
- where the use of YYERROR1 above caused an error
- which then was handled by compstmt_or_error.
- There followed a repeated execution of that same rule,
- which called YYERROR1 again, and so on. */
- compstmt
- { finish_function (1);
- pop_c_function_context (); }
- ;
-
- /* Any kind of declarator (thus, all declarators allowed
- after an explicit typespec). */
-
- declarator:
- after_type_declarator
- | notype_declarator
- ;
-
- /* A declarator that is allowed only after an explicit typespec. */
-
- after_type_declarator:
- '(' after_type_declarator ')'
- { $$ = $2; }
- | after_type_declarator '(' parmlist_or_identifiers %prec '.'
- { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
- /* | after_type_declarator '(' error ')' %prec '.'
- { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
- poplevel (0, 0, 0); } */
- | after_type_declarator '[' expr ']' %prec '.'
- { $$ = build_nt (ARRAY_REF, $1, $3); }
- | after_type_declarator '[' ']' %prec '.'
- { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
- | '*' type_quals after_type_declarator %prec UNARY
- { $$ = make_pointer_declarator ($2, $3); }
- | TYPENAME
- ;
-
- /* Kinds of declarator that can appear in a parameter list
- in addition to notype_declarator. This is like after_type_declarator
- but does not allow a typedef name in parentheses as an identifier
- (because it would conflict with a function with that typedef as arg). */
-
- parm_declarator:
- parm_declarator '(' parmlist_or_identifiers %prec '.'
- { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
- /* | parm_declarator '(' error ')' %prec '.'
- { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
- poplevel (0, 0, 0); } */
- | parm_declarator '[' expr ']' %prec '.'
- { $$ = build_nt (ARRAY_REF, $1, $3); }
- | parm_declarator '[' ']' %prec '.'
- { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
- | '*' type_quals parm_declarator %prec UNARY
- { $$ = make_pointer_declarator ($2, $3); }
- | TYPENAME
- ;
-
- /* A declarator allowed whether or not there has been
- an explicit typespec. These cannot redeclare a typedef-name. */
-
- notype_declarator:
- notype_declarator '(' parmlist_or_identifiers %prec '.'
- { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
- /* | notype_declarator '(' error ')' %prec '.'
- { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
- poplevel (0, 0, 0); } */
- | '(' notype_declarator ')'
- { $$ = $2; }
- | '*' type_quals notype_declarator %prec UNARY
- { $$ = make_pointer_declarator ($2, $3); }
- | notype_declarator '[' expr ']' %prec '.'
- { $$ = build_nt (ARRAY_REF, $1, $3); }
- | notype_declarator '[' ']' %prec '.'
- { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
- | IDENTIFIER
- ;
-
- structsp:
- STRUCT identifier '{'
- { $$ = start_struct (RECORD_TYPE, $2);
- /* Start scope of tag before parsing components. */
- }
- component_decl_list '}'
- { $$ = finish_struct ($<ttype>4, $5);
- /* Really define the structure. */
- }
- | STRUCT '{' component_decl_list '}'
- { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
- $3); }
- | STRUCT identifier
- { $$ = xref_tag (RECORD_TYPE, $2); }
- | UNION identifier '{'
- { $$ = start_struct (UNION_TYPE, $2); }
- component_decl_list '}'
- { $$ = finish_struct ($<ttype>4, $5); }
- | UNION '{' component_decl_list '}'
- { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
- $3); }
- | UNION identifier
- { $$ = xref_tag (UNION_TYPE, $2); }
- | ENUM identifier '{'
- { $<itype>3 = suspend_momentary ();
- $$ = start_enum ($2); }
- enumlist maybecomma_warn '}'
- { $$ = finish_enum ($<ttype>4, nreverse ($5));
- resume_momentary ($<itype>3); }
- | ENUM '{'
- { $<itype>2 = suspend_momentary ();
- $$ = start_enum (NULL_TREE); }
- enumlist maybecomma_warn '}'
- { $$ = finish_enum ($<ttype>3, nreverse ($4));
- resume_momentary ($<itype>2); }
- | ENUM identifier
- { $$ = xref_tag (ENUMERAL_TYPE, $2); }
- ;
-
- maybecomma:
- /* empty */
- | ','
- ;
-
- maybecomma_warn:
- /* empty */
- | ','
- { if (pedantic) pedwarn ("comma at end of enumerator list"); }
- ;
-
- component_decl_list:
- component_decl_list2
- { $$ = $1; }
- | component_decl_list2 component_decl
- { $$ = chainon ($1, $2);
- pedwarn ("no semicolon at end of struct or union"); }
- ;
-
- component_decl_list2: /* empty */
- { $$ = NULL_TREE; }
- | component_decl_list2 component_decl ';'
- { $$ = chainon ($1, $2); }
- | component_decl_list2 ';'
- { if (pedantic)
- pedwarn ("extra semicolon in struct or union specified"); }
- ifobjc
- /* foo(sizeof(struct{ @defs(ClassName)})); */
- | DEFS '(' CLASSNAME ')'
- { $$ = get_class_ivars ($3); }
- end ifobjc
- ;
-
- /* There is a shift-reduce conflict here, because `components' may
- start with a `typename'. It happens that shifting (the default resolution)
- does the right thing, because it treats the `typename' as part of
- a `typed_typespecs'.
-
- It is possible that this same technique would allow the distinction
- between `notype_initdecls' and `initdecls' to be eliminated.
- But I am being cautious and not trying it. */
-
- component_decl:
- typed_typespecs setspecs components
- { $$ = $3;
- current_declspecs = TREE_VALUE (declspec_stack);
- declspec_stack = TREE_CHAIN (declspec_stack);
- resume_momentary ($2); }
- | typed_typespecs
- { if (pedantic)
- pedwarn ("ANSI C forbids member declarations with no members");
- shadow_tag($1);
- $$ = NULL_TREE; }
- | nonempty_type_quals setspecs components
- { $$ = $3;
- current_declspecs = TREE_VALUE (declspec_stack);
- declspec_stack = TREE_CHAIN (declspec_stack);
- resume_momentary ($2); }
- | nonempty_type_quals
- { if (pedantic)
- pedwarn ("ANSI C forbids member declarations with no members");
- shadow_tag($1);
- $$ = NULL_TREE; }
- | error
- { $$ = NULL_TREE; }
- ;
-
- components:
- component_declarator
- | components ',' component_declarator
- { $$ = chainon ($1, $3); }
- ;
-
- component_declarator:
- save_filename save_lineno declarator maybe_attribute
- { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
- decl_attributes ($$, $4); }
- | save_filename save_lineno
- declarator ':' expr_no_commas maybe_attribute
- { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
- decl_attributes ($$, $6); }
- | save_filename save_lineno ':' expr_no_commas
- { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4); }
- ;
-
- /* We chain the enumerators in reverse order.
- They are put in forward order where enumlist is used.
- (The order used to be significant, but no longer is so.
- However, we still maintain the order, just to be clean.) */
-
- enumlist:
- enumerator
- | enumlist ',' enumerator
- { $$ = chainon ($3, $1); }
- ;
-
-
- enumerator:
- identifier
- { $$ = build_enumerator ($1, NULL_TREE); }
- | identifier '=' expr_no_commas
- { $$ = build_enumerator ($1, $3); }
- ;
-
- typename:
- typed_typespecs absdcl
- { $$ = build_tree_list ($1, $2); }
- | nonempty_type_quals absdcl
- { $$ = build_tree_list ($1, $2); }
- ;
-
- absdcl: /* an absolute declarator */
- /* empty */
- { $$ = NULL_TREE; }
- | absdcl1
- ;
-
- nonempty_type_quals:
- TYPE_QUAL
- { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
- | nonempty_type_quals TYPE_QUAL
- { $$ = tree_cons (NULL_TREE, $2, $1); }
- ;
-
- type_quals:
- /* empty */
- { $$ = NULL_TREE; }
- | type_quals TYPE_QUAL
- { $$ = tree_cons (NULL_TREE, $2, $1); }
- ;
-
- absdcl1: /* a nonempty absolute declarator */
- '(' absdcl1 ')'
- { $$ = $2; }
- /* `(typedef)1' is `int'. */
- | '*' type_quals absdcl1 %prec UNARY
- { $$ = make_pointer_declarator ($2, $3); }
- | '*' type_quals %prec UNARY
- { $$ = make_pointer_declarator ($2, NULL_TREE); }
- | absdcl1 '(' parmlist %prec '.'
- { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
- | absdcl1 '[' expr ']' %prec '.'
- { $$ = build_nt (ARRAY_REF, $1, $3); }
- | absdcl1 '[' ']' %prec '.'
- { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
- | '(' parmlist %prec '.'
- { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
- | '[' expr ']' %prec '.'
- { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
- | '[' ']' %prec '.'
- { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
- ;
-
- /* at least one statement, the first of which parses without error. */
- /* stmts is used only after decls, so an invalid first statement
- is actually regarded as an invalid decl and part of the decls. */
-
- stmts:
- lineno_stmt_or_label
- | stmts lineno_stmt_or_label
- | stmts errstmt
- ;
-
- xstmts:
- /* empty */
- | stmts
- ;
-
- errstmt: error ';'
- ;
-
- pushlevel: /* empty */
- { emit_line_note (input_filename, lineno);
- pushlevel (0);
- clear_last_expr ();
- push_momentary ();
- expand_start_bindings (0);
- ifobjc
- if (objc_method_context)
- add_objc_decls ();
- end ifobjc
- }
- ;
-
- /* Read zero or more forward-declarations for labels
- that nested functions can jump to. */
- maybe_label_decls:
- /* empty */
- | label_decls
- { if (pedantic)
- pedwarn ("ANSI C forbids label declarations"); }
- ;
-
- label_decls:
- label_decl
- | label_decls label_decl
- ;
-
- label_decl:
- LABEL identifiers_or_typenames ';'
- { tree link;
- for (link = $2; link; link = TREE_CHAIN (link))
- {
- tree label = shadow_label (TREE_VALUE (link));
- C_DECLARED_LABEL_FLAG (label) = 1;
- declare_nonlocal_label (label);
- }
- }
- ;
-
- /* This is the body of a function definition.
- It causes syntax errors to ignore to the next openbrace. */
- compstmt_or_error:
- compstmt
- {}
- | error compstmt
- ;
-
- compstmt: '{' '}'
- { $$ = convert (void_type_node, integer_zero_node); }
- | '{' pushlevel maybe_label_decls decls xstmts '}'
- { emit_line_note (input_filename, lineno);
- expand_end_bindings (getdecls (), 1, 0);
- $$ = poplevel (1, 1, 0);
- pop_momentary (); }
- | '{' pushlevel maybe_label_decls error '}'
- { emit_line_note (input_filename, lineno);
- expand_end_bindings (getdecls (), kept_level_p (), 0);
- $$ = poplevel (kept_level_p (), 0, 0);
- pop_momentary (); }
- | '{' pushlevel maybe_label_decls stmts '}'
- { emit_line_note (input_filename, lineno);
- expand_end_bindings (getdecls (), kept_level_p (), 0);
- $$ = poplevel (kept_level_p (), 0, 0);
- pop_momentary (); }
- ;
-
- /* Value is number of statements counted as of the closeparen. */
- simple_if:
- if_prefix lineno_labeled_stmt
- /* Make sure expand_end_cond is run once
- for each call to expand_start_cond.
- Otherwise a crash is likely. */
- | if_prefix error
- ;
-
- if_prefix:
- IF '(' expr ')'
- { emit_line_note ($<filename>-1, $<lineno>0);
- expand_start_cond (truthvalue_conversion ($3), 0);
- $<itype>1 = stmt_count;
- if_stmt_file = $<filename>-1;
- if_stmt_line = $<lineno>0;
- position_after_white_space (); }
- ;
-
- /* This is a subroutine of stmt.
- It is used twice, once for valid DO statements
- and once for catching errors in parsing the end test. */
- do_stmt_start:
- DO
- { stmt_count++;
- emit_line_note ($<filename>-1, $<lineno>0);
- /* See comment in `while' alternative, above. */
- emit_nop ();
- expand_start_loop_continue_elsewhere (1);
- position_after_white_space (); }
- lineno_labeled_stmt WHILE
- { expand_loop_continue_here (); }
- ;
-
- save_filename:
- { $$ = input_filename; }
- ;
-
- save_lineno:
- { $$ = lineno; }
- ;
-
- lineno_labeled_stmt:
- save_filename save_lineno stmt
- { }
- /* | save_filename save_lineno error
- { }
- */
- | save_filename save_lineno label lineno_labeled_stmt
- { }
- ;
-
- lineno_stmt_or_label:
- save_filename save_lineno stmt_or_label
- { }
- ;
-
- stmt_or_label:
- stmt
- | label
- { int next;
- position_after_white_space ();
- next = getc (finput);
- ungetc (next, finput);
- if (pedantic && next == '}')
- pedwarn ("ANSI C forbids label at end of compound statement");
- }
- ;
-
- /* Parse a single real statement, not including any labels. */
- stmt:
- compstmt
- { stmt_count++; }
- | expr ';'
- { stmt_count++;
- emit_line_note ($<filename>-1, $<lineno>0);
- c_expand_expr_stmt ($1);
- clear_momentary (); }
- | simple_if ELSE
- { expand_start_else ();
- $<itype>1 = stmt_count;
- position_after_white_space (); }
- lineno_labeled_stmt
- { expand_end_cond ();
- if (extra_warnings && stmt_count == $<itype>1)
- warning ("empty body in an else-statement"); }
- | simple_if %prec IF
- { expand_end_cond ();
- if (extra_warnings && stmt_count == $<itype>1)
- warning_with_file_and_line (if_stmt_file, if_stmt_line,
- "empty body in an if-statement"); }
- /* Make sure expand_end_cond is run once
- for each call to expand_start_cond.
- Otherwise a crash is likely. */
- | simple_if ELSE error
- { expand_end_cond (); }
- | WHILE
- { stmt_count++;
- emit_line_note ($<filename>-1, $<lineno>0);
- /* The emit_nop used to come before emit_line_note,
- but that made the nop seem like part of the preceding line.
- And that was confusing when the preceding line was
- inside of an if statement and was not really executed.
- I think it ought to work to put the nop after the line number.
- We will see. --rms, July 15, 1991. */
- emit_nop (); }
- '(' expr ')'
- { /* Don't start the loop till we have succeeded
- in parsing the end test. This is to make sure
- that we end every loop we start. */
- expand_start_loop (1);
- emit_line_note (input_filename, lineno);
- expand_exit_loop_if_false (NULL_PTR,
- truthvalue_conversion ($4));
- position_after_white_space (); }
- lineno_labeled_stmt
- { expand_end_loop (); }
- | do_stmt_start
- '(' expr ')' ';'
- { emit_line_note (input_filename, lineno);
- expand_exit_loop_if_false (NULL_PTR,
- truthvalue_conversion ($3));
- expand_end_loop ();
- clear_momentary (); }
- /* This rule is needed to make sure we end every loop we start. */
- | do_stmt_start error
- { expand_end_loop ();
- clear_momentary (); }
- | FOR
- '(' xexpr ';'
- { stmt_count++;
- emit_line_note ($<filename>-1, $<lineno>0);
- /* See comment in `while' alternative, above. */
- emit_nop ();
- if ($3) c_expand_expr_stmt ($3);
- /* Next step is to call expand_start_loop_continue_elsewhere,
- but wait till after we parse the entire for (...).
- Otherwise, invalid input might cause us to call that
- fn without calling expand_end_loop. */
- }
- xexpr ';'
- /* Can't emit now; wait till after expand_start_loop... */
- { $<lineno>7 = lineno;
- $<filename>$ = input_filename; }
- xexpr ')'
- {
- /* Start the loop. Doing this after parsing
- all the expressions ensures we will end the loop. */
- expand_start_loop_continue_elsewhere (1);
- /* Emit the end-test, with a line number. */
- emit_line_note ($<filename>8, $<lineno>7);
- if ($6)
- expand_exit_loop_if_false (NULL_PTR,
- truthvalue_conversion ($6));
- /* Don't let the tree nodes for $9 be discarded by
- clear_momentary during the parsing of the next stmt. */
- push_momentary ();
- $<lineno>7 = lineno;
- $<filename>8 = input_filename; }
- lineno_labeled_stmt
- { /* Emit the increment expression, with a line number. */
- emit_line_note ($<filename>8, $<lineno>7);
- expand_loop_continue_here ();
- if ($9)
- c_expand_expr_stmt ($9);
- pop_momentary ();
- expand_end_loop (); }
- | SWITCH '(' expr ')'
- { stmt_count++;
- emit_line_note ($<filename>-1, $<lineno>0);
- c_expand_start_case ($3);
- /* Don't let the tree nodes for $3 be discarded by
- clear_momentary during the parsing of the next stmt. */
- push_momentary ();
- position_after_white_space (); }
- lineno_labeled_stmt
- { expand_end_case ($3);
- pop_momentary (); }
- | BREAK ';'
- { stmt_count++;
- emit_line_note ($<filename>-1, $<lineno>0);
- if ( ! expand_exit_something ())
- error ("break statement not within loop or switch"); }
- | CONTINUE ';'
- { stmt_count++;
- emit_line_note ($<filename>-1, $<lineno>0);
- if (! expand_continue_loop (NULL_PTR))
- error ("continue statement not within a loop"); }
- | RETURN ';'
- { stmt_count++;
- emit_line_note ($<filename>-1, $<lineno>0);
- c_expand_return (NULL_TREE); }
- | RETURN expr ';'
- { stmt_count++;
- emit_line_note ($<filename>-1, $<lineno>0);
- c_expand_return ($2); }
- | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
- { stmt_count++;
- emit_line_note ($<filename>-1, $<lineno>0);
- STRIP_NOPS ($4);
- if ((TREE_CODE ($4) == ADDR_EXPR
- && TREE_CODE (TREE_OPERAND ($4, 0)) == STRING_CST)
- || TREE_CODE ($4) == STRING_CST)
- expand_asm ($4);
- else
- error ("argument of `asm' is not a constant string"); }
- /* This is the case with just output operands. */
- | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
- { stmt_count++;
- emit_line_note ($<filename>-1, $<lineno>0);
- c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
- $2 == ridpointers[(int)RID_VOLATILE],
- input_filename, lineno); }
- /* This is the case with input operands as well. */
- | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
- { stmt_count++;
- emit_line_note ($<filename>-1, $<lineno>0);
- c_expand_asm_operands ($4, $6, $8, NULL_TREE,
- $2 == ridpointers[(int)RID_VOLATILE],
- input_filename, lineno); }
- /* This is the case with clobbered registers as well. */
- | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
- asm_operands ':' asm_clobbers ')' ';'
- { stmt_count++;
- emit_line_note ($<filename>-1, $<lineno>0);
- c_expand_asm_operands ($4, $6, $8, $10,
- $2 == ridpointers[(int)RID_VOLATILE],
- input_filename, lineno); }
- | GOTO identifier ';'
- { tree decl;
- stmt_count++;
- emit_line_note ($<filename>-1, $<lineno>0);
- decl = lookup_label ($2);
- if (decl != 0)
- {
- TREE_USED (decl) = 1;
- expand_goto (decl);
- }
- }
- | GOTO '*' expr ';'
- { stmt_count++;
- emit_line_note ($<filename>-1, $<lineno>0);
- expand_computed_goto (convert (ptr_type_node, $3)); }
- | ';'
- ;
-
- /* Any kind of label, including jump labels and case labels.
- ANSI C accepts labels only before statements, but we allow them
- also at the end of a compound statement. */
-
- label: CASE expr ':'
- { register tree value = check_case_value ($2);
- register tree label
- = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
-
- stmt_count++;
-
- if (value != error_mark_node)
- {
- tree duplicate;
- int success = pushcase (value, label, &duplicate);
- if (success == 1)
- error ("case label not within a switch statement");
- else if (success == 2)
- {
- error ("duplicate case value");
- error_with_decl (duplicate, "this is the first entry for that value");
- }
- else if (success == 3)
- warning ("case value out of range");
- else if (success == 5)
- error ("case label within scope of cleanup or variable array");
- }
- position_after_white_space (); }
- | CASE expr ELLIPSIS expr ':'
- { register tree value1 = check_case_value ($2);
- register tree value2 = check_case_value ($4);
- register tree label
- = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
-
- stmt_count++;
-
- if (value1 != error_mark_node && value2 != error_mark_node)
- {
- tree duplicate;
- int success = pushcase_range (value1, value2, label,
- &duplicate);
- if (success == 1)
- error ("case label not within a switch statement");
- else if (success == 2)
- {
- error ("duplicate case value");
- error_with_decl (duplicate, "this is the first entry for that value");
- }
- else if (success == 3)
- warning ("case value out of range");
- else if (success == 4)
- warning ("empty case range");
- else if (success == 5)
- error ("case label within scope of cleanup or variable array");
- }
- position_after_white_space (); }
- | DEFAULT ':'
- {
- tree duplicate;
- register tree label
- = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
- int success = pushcase (NULL_TREE, label, &duplicate);
- stmt_count++;
- if (success == 1)
- error ("default label not within a switch statement");
- else if (success == 2)
- {
- error ("multiple default labels in one switch");
- error_with_decl (duplicate, "this is the first default label");
- }
- position_after_white_space (); }
- | identifier ':'
- { tree label = define_label (input_filename, lineno, $1);
- stmt_count++;
- emit_nop ();
- if (label)
- expand_label (label);
- position_after_white_space (); }
- ;
-
- /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
-
- maybe_type_qual:
- /* empty */
- { emit_line_note (input_filename, lineno); }
- | TYPE_QUAL
- { emit_line_note (input_filename, lineno); }
- ;
-
- xexpr:
- /* empty */
- { $$ = NULL_TREE; }
- | expr
- ;
-
- /* These are the operands other than the first string and colon
- in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
- asm_operands: /* empty */
- { $$ = NULL_TREE; }
- | nonnull_asm_operands
- ;
-
- nonnull_asm_operands:
- asm_operand
- | nonnull_asm_operands ',' asm_operand
- { $$ = chainon ($1, $3); }
- ;
-
- asm_operand:
- STRING '(' expr ')'
- { $$ = build_tree_list ($1, $3); }
- ;
-
- asm_clobbers:
- string
- { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
- | asm_clobbers ',' string
- { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
- ;
-
- /* This is what appears inside the parens in a function declarator.
- Its value is a list of ..._TYPE nodes. */
- parmlist:
- { pushlevel (0);
- clear_parm_order ();
- declare_parm_level (0); }
- parmlist_1
- { $$ = $2;
- parmlist_tags_warning ();
- poplevel (0, 0, 0); }
- ;
-
- parmlist_1:
- parmlist_2 ')'
- | parms ';'
- { tree parm;
- if (pedantic)
- pedwarn ("ANSI C forbids forward parameter declarations");
- /* Mark the forward decls as such. */
- for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
- TREE_ASM_WRITTEN (parm) = 1;
- clear_parm_order (); }
- parmlist_1
- { $$ = $4; }
- | error ')'
- { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
- ;
-
- /* This is what appears inside the parens in a function declarator.
- Is value is represented in the format that grokdeclarator expects. */
- parmlist_2: /* empty */
- { $$ = get_parm_info (0); }
- | ELLIPSIS
- { $$ = get_parm_info (0);
- if (pedantic)
- pedwarn ("ANSI C requires a named argument before `...'");
- }
- | parms
- { $$ = get_parm_info (1); }
- | parms ',' ELLIPSIS
- { $$ = get_parm_info (0); }
- ;
-
- parms:
- parm
- { push_parm_decl ($1); }
- | parms ',' parm
- { push_parm_decl ($3); }
- ;
-
- /* A single parameter declaration or parameter type name,
- as found in a parmlist. */
- parm:
- typed_declspecs parm_declarator
- { $$ = build_tree_list ($1, $2) ; }
- | typed_declspecs notype_declarator
- { $$ = build_tree_list ($1, $2) ; }
- | typed_declspecs absdcl
- { $$ = build_tree_list ($1, $2); }
- | declmods notype_declarator
- { $$ = build_tree_list ($1, $2) ; }
- | declmods absdcl
- { $$ = build_tree_list ($1, $2); }
- ;
-
- /* This is used in a function definition
- where either a parmlist or an identifier list is ok.
- Its value is a list of ..._TYPE nodes or a list of identifiers. */
- parmlist_or_identifiers:
- { pushlevel (0);
- clear_parm_order ();
- declare_parm_level (1); }
- parmlist_or_identifiers_1
- { $$ = $2;
- parmlist_tags_warning ();
- poplevel (0, 0, 0); }
- ;
-
- parmlist_or_identifiers_1:
- parmlist_1
- | identifiers ')'
- { tree t;
- for (t = $1; t; t = TREE_CHAIN (t))
- if (TREE_VALUE (t) == NULL_TREE)
- error ("`...' in old-style identifier list");
- $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
- ;
-
- /* A nonempty list of identifiers. */
- identifiers:
- IDENTIFIER
- { $$ = build_tree_list (NULL_TREE, $1); }
- | identifiers ',' IDENTIFIER
- { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
- ;
-
- /* A nonempty list of identifiers, including typenames. */
- identifiers_or_typenames:
- identifier
- { $$ = build_tree_list (NULL_TREE, $1); }
- | identifiers_or_typenames ',' identifier
- { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
- ;
-
- ifobjc
- /* Objective-C productions. */
-
- objcdef:
- classdef
- | methoddef
- | END
- {
- if (objc_implementation_context)
- {
- finish_class (objc_implementation_context);
- objc_ivar_chain = NULL_TREE;
- objc_implementation_context = NULL_TREE;
- }
- else
- warning ("`@end' must appear in an implementation context");
- }
- ;
-
- classdef:
- INTERFACE identifier '{'
- {
- objc_interface_context = objc_ivar_context
- = start_class (INTERFACE_TYPE, $2, NULL_TREE);
- objc_public_flag = 0;
- }
- ivar_decl_list '}'
- {
- continue_class (objc_interface_context);
- }
- methodprotolist
- END
- {
- finish_class (objc_interface_context);
- objc_interface_context = NULL_TREE;
- }
-
- | INTERFACE identifier
- {
- objc_interface_context
- = start_class (INTERFACE_TYPE, $2, NULL_TREE);
- continue_class (objc_interface_context);
- }
- methodprotolist
- END
- {
- finish_class (objc_interface_context);
- objc_interface_context = NULL_TREE;
- }
-
- | INTERFACE identifier ':' identifier '{'
- {
- objc_interface_context = objc_ivar_context
- = start_class (INTERFACE_TYPE, $2, $4);
- objc_public_flag = 0;
- }
- ivar_decl_list '}'
- {
- continue_class (objc_interface_context);
- }
- methodprotolist
- END
- {
- finish_class (objc_interface_context);
- objc_interface_context = NULL_TREE;
- }
-
- | INTERFACE identifier ':' identifier
- {
- objc_interface_context
- = start_class (INTERFACE_TYPE, $2, $4);
- continue_class (objc_interface_context);
- }
- methodprotolist
- END
- {
- finish_class (objc_interface_context);
- objc_interface_context = NULL_TREE;
- }
-
- | IMPLEMENTATION identifier '{'
- {
- objc_implementation_context = objc_ivar_context
- = start_class (IMPLEMENTATION_TYPE, $2, NULL_TREE);
- objc_public_flag = 0;
- }
- ivar_decl_list '}'
- {
- objc_ivar_chain
- = continue_class (objc_implementation_context);
- }
-
- | IMPLEMENTATION identifier
- {
- objc_implementation_context
- = start_class (IMPLEMENTATION_TYPE, $2, NULL_TREE);
- objc_ivar_chain
- = continue_class (objc_implementation_context);
- }
-
- | IMPLEMENTATION identifier ':' identifier '{'
- {
- objc_implementation_context = objc_ivar_context
- = start_class (IMPLEMENTATION_TYPE, $2, $4);
- objc_public_flag = 0;
- }
- ivar_decl_list '}'
- {
- objc_ivar_chain
- = continue_class (objc_implementation_context);
- }
-
- | IMPLEMENTATION identifier ':' identifier
- {
- objc_implementation_context
- = start_class (IMPLEMENTATION_TYPE, $2, $4);
- objc_ivar_chain
- = continue_class (objc_implementation_context);
- }
-
- | INTERFACE identifier '(' identifier ')'
- {
- objc_interface_context
- = start_class (PROTOCOL_TYPE, $2, $4);
- continue_class (objc_interface_context);
- }
- methodprotolist
- END
- {
- finish_class (objc_interface_context);
- objc_interface_context = NULL_TREE;
- }
-
- | IMPLEMENTATION identifier '(' identifier ')'
- {
- objc_implementation_context
- = start_class (CATEGORY_TYPE, $2, $4);
- objc_ivar_chain
- = continue_class (objc_implementation_context);
- }
- ;
-
- ivar_decl_list:
- ivar_decls PUBLIC { objc_public_flag = 1; } ivar_decls
- | ivar_decls
- ;
-
- ivar_decls:
- /* empty */
- {
- $$ = NULL_TREE;
- }
- | ivar_decls ivar_decl ';'
- | ivar_decls ';'
- {
- if (pedantic)
- warning ("extra semicolon in struct or union specified");
- }
- ;
-
-
- /* There is a shift-reduce conflict here, because `components' may
- start with a `typename'. It happens that shifting (the default resolution)
- does the right thing, because it treats the `typename' as part of
- a `typed_typespecs'.
-
- It is possible that this same technique would allow the distinction
- between `notype_initdecls' and `initdecls' to be eliminated.
- But I am being cautious and not trying it. */
-
- ivar_decl:
- typed_typespecs setspecs ivars
- {
- $$ = $3;
- resume_momentary ($2);
- }
- | nonempty_type_quals setspecs ivars
- {
- $$ = $3;
- resume_momentary ($2);
- }
- | error
- { $$ = NULL_TREE; }
- ;
-
- ivars:
- /* empty */
- { $$ = NULL_TREE; }
- | ivar_declarator
- | ivars ',' ivar_declarator
- ;
-
- ivar_declarator:
- declarator
- {
- $$ = add_instance_variable (objc_ivar_context,
- objc_public_flag,
- $1, current_declspecs,
- NULL_TREE);
- }
- | declarator ':' expr_no_commas
- {
- $$ = add_instance_variable (objc_ivar_context,
- objc_public_flag,
- $1, current_declspecs, $3);
- }
- | ':' expr_no_commas
- {
- $$ = add_instance_variable (objc_ivar_context,
- objc_public_flag,
- NULL_TREE,
- current_declspecs, $2);
- }
- ;
-
- methoddef:
- '+'
- {
- if (objc_implementation_context)
- objc_inherit_code = CLASS_METHOD_DECL;
- else
- fatal ("method definition not in class context");
- }
- methoddecl
- {
- add_class_method (objc_implementation_context, $3);
- start_method_def ($3);
- objc_method_context = $3;
- }
- optarglist
- {
- continue_method_def ();
- }
- compstmt_or_error
- {
- finish_method_def ();
- objc_method_context = NULL_TREE;
- }
-
- | '-'
- {
- if (objc_implementation_context)
- objc_inherit_code = INSTANCE_METHOD_DECL;
- else
- fatal ("method definition not in class context");
- }
- methoddecl
- {
- add_instance_method (objc_implementation_context, $3);
- start_method_def ($3);
- objc_method_context = $3;
- }
- optarglist
- {
- continue_method_def ();
- }
- compstmt_or_error
- {
- finish_method_def ();
- objc_method_context = NULL_TREE;
- }
- ;
-
- /* the reason for the strange actions in this rule
- is so that notype_initdecls when reached via datadef
- can find a valid list of type and sc specs in $0. */
-
- methodprotolist:
- /* empty */
- | {$<ttype>$ = NULL_TREE; } methodprotolist2
- ;
-
- methodprotolist2: /* eliminates a shift/reduce conflict */
- methodproto
- | datadef
- | methodprotolist2 methodproto
- | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
- ;
-
- semi_or_error:
- ';'
- | error
- ;
-
- methodproto:
- '+'
- {
- objc_inherit_code = CLASS_METHOD_DECL;
- }
- methoddecl
- {
- add_class_method (objc_interface_context, $3);
- }
- semi_or_error
-
- | '-'
- {
- objc_inherit_code = INSTANCE_METHOD_DECL;
- }
- methoddecl
- {
- add_instance_method (objc_interface_context, $3);
- }
- semi_or_error
- ;
-
- methoddecl:
- '(' typename ')' unaryselector
- {
- $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
- }
-
- | unaryselector
- {
- $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
- }
-
- | '(' typename ')' keywordselector optparmlist
- {
- $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
- }
-
- | keywordselector optparmlist
- {
- $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
- }
- ;
-
- /* "optarglist" assumes that start_method_def has already been called...
- if it is not, the "xdecls" will not be placed in the proper scope */
-
- optarglist:
- /* empty */
- | ';' myxdecls
- ;
-
- /* to get around the following situation: "int foo (int a) int b; {}" that
- is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
-
- myxdecls:
- /* empty */
- | mydecls
- ;
-
- mydecls:
- mydecl
- | errstmt
- | mydecls mydecl
- | mydecl errstmt
- ;
-
- mydecl:
- typed_declspecs setspecs myparms ';'
- { resume_momentary ($2); }
- | typed_declspecs ';'
- { shadow_tag ($1); }
- | declmods ';'
- { pedwarn ("empty declaration"); }
- ;
-
- myparms:
- myparm
- { push_parm_decl ($1); }
- | myparms ',' myparm
- { push_parm_decl ($3); }
- ;
-
- /* A single parameter declaration or parameter type name,
- as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
-
- myparm:
- parm_declarator
- { $$ = build_tree_list (current_declspecs, $1) ; }
- | notype_declarator
- { $$ = build_tree_list (current_declspecs, $1) ; }
- | absdcl
- { $$ = build_tree_list (current_declspecs, $1) ; }
- ;
-
- optparmlist:
- /* empty */
- {
- $$ = NULL_TREE;
- }
- | ',' ELLIPSIS
- {
- /* oh what a kludge! */
- $$ = (tree)1;
- }
- | ','
- {
- pushlevel (0);
- }
- parmlist_2
- {
- /* returns a tree list node generated by get_parm_info */
- $$ = $3;
- poplevel (0, 0, 0);
- }
- ;
-
- unaryselector:
- selector
- ;
-
- keywordselector:
- keyworddecl
-
- | keywordselector keyworddecl
- {
- $$ = chainon ($1, $2);
- }
- ;
-
- selector:
- IDENTIFIER
- | TYPENAME
- | reservedwords
- ;
-
- reservedwords:
- ENUM { $$ = get_identifier (token_buffer); }
- | STRUCT { $$ = get_identifier (token_buffer); }
- | UNION { $$ = get_identifier (token_buffer); }
- | IF { $$ = get_identifier (token_buffer); }
- | ELSE { $$ = get_identifier (token_buffer); }
- | WHILE { $$ = get_identifier (token_buffer); }
- | DO { $$ = get_identifier (token_buffer); }
- | FOR { $$ = get_identifier (token_buffer); }
- | SWITCH { $$ = get_identifier (token_buffer); }
- | CASE { $$ = get_identifier (token_buffer); }
- | DEFAULT { $$ = get_identifier (token_buffer); }
- | BREAK { $$ = get_identifier (token_buffer); }
- | CONTINUE { $$ = get_identifier (token_buffer); }
- | RETURN { $$ = get_identifier (token_buffer); }
- | GOTO { $$ = get_identifier (token_buffer); }
- | ASM_KEYWORD { $$ = get_identifier (token_buffer); }
- | SIZEOF { $$ = get_identifier (token_buffer); }
- | TYPEOF { $$ = get_identifier (token_buffer); }
- | ALIGNOF { $$ = get_identifier (token_buffer); }
- | TYPESPEC | TYPE_QUAL
- ;
-
- keyworddecl:
- selector ':' '(' typename ')' identifier
- {
- $$ = build_keyword_decl ($1, $4, $6);
- }
-
- | selector ':' identifier
- {
- $$ = build_keyword_decl ($1, NULL_TREE, $3);
- }
-
- | ':' '(' typename ')' identifier
- {
- $$ = build_keyword_decl (NULL_TREE, $3, $5);
- }
-
- | ':' identifier
- {
- $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
- }
- ;
-
- messageargs:
- selector
- | keywordarglist
- ;
-
- keywordarglist:
- keywordarg
- | keywordarglist keywordarg
- {
- $$ = chainon ($1, $2);
- }
- ;
-
-
- keywordexpr:
- nonnull_exprlist
- {
- if (TREE_CHAIN ($1) == NULL_TREE)
- /* just return the expr., remove a level of indirection */
- $$ = TREE_VALUE ($1);
- else
- /* we have a comma expr., we will collapse later */
- $$ = $1;
- }
- ;
-
- keywordarg:
- selector ':' keywordexpr
- {
- $$ = build_tree_list ($1, $3);
- }
- | ':' keywordexpr
- {
- $$ = build_tree_list (NULL_TREE, $2);
- }
- ;
-
- receiver:
- expr
- | CLASSNAME
- {
- $$ = get_class_reference ($1);
- }
- ;
-
- objcmessageexpr:
- '['
- { objc_receiver_context = 1; }
- receiver
- { objc_receiver_context = 0; }
- messageargs ']'
- {
- $$ = build_tree_list ($3, $5);
- }
- ;
-
- selectorarg:
- selector
- | keywordnamelist
- ;
-
- keywordnamelist:
- keywordname
- | keywordnamelist keywordname
- {
- $$ = chainon ($1, $2);
- }
- ;
-
- keywordname:
- selector ':'
- {
- $$ = build_tree_list ($1, NULL_TREE);
- }
- | ':'
- {
- $$ = build_tree_list (NULL_TREE, NULL_TREE);
- }
- ;
-
- objcselectorexpr:
- SELECTOR '(' selectorarg ')'
- {
- $$ = $3;
- }
- ;
-
- /* extension to support C-structures in the archiver */
-
- objcencodeexpr:
- ENCODE '(' typename ')'
- {
- $$ = groktypename ($3);
- }
- ;
-
- end ifobjc
- %%
- ifobjc
-
- /* If STRING is the name of an Objective C @-keyword
- (not including the @), return the token type for that keyword.
- Otherwise return 0. */
-
- int
- recognize_objc_keyword (string)
- char *string;
- {
- switch (string[0])
- {
- case 'd':
- if (!strcmp (string, "defs"))
- return DEFS;
- break;
- case 'e':
- if (!strcmp (string, "end"))
- return END;
- if (!strcmp (string, "encode"))
- return ENCODE;
- break;
- case 'i':
- if (!strcmp (string, "interface"))
- return INTERFACE;
- if (!strcmp (string, "implementation"))
- return IMPLEMENTATION;
- break;
- case 'p':
- if (!strcmp (string, "public"))
- return PUBLIC;
- break;
- case 's':
- if (!strcmp (string, "selector"))
- return SELECTOR;
- break;
- }
- return 0;
- }
-
- end ifobjc
-